You have to calculate the superelevation(e) for a highway having a design speed as v (in km/h). Which of the following options gives the CORRECT relation to find the design speed such that radius of the curve is r (in m) and the coefficient of friction is f?
1
e = (v2/127r) - f
2
e = v2f/127r
3
e = (v2/127r) + f
4
e = v2r/127f